Fix focus policy propagation bug in QCompleter.

Commit 4a00810cc394b7da99ddb2d13eb045352ede25d3 ensures
that setting the focus policy of a widget applies to its
proxy (if any) as well. This propagation effect is however
unfortunate for a QCompleter in PopupCompletion mode.
The client widget (typically a QLineEdit or a QTextEdit)
acts as the focus proxy to the popup menu. Internally,
the completer sets the focus policy of the popup menu to
NoFocus, but this should not affect the focus policy of
the editor.

Reviewed-by: janarve
Task-number: 250064

1 files changed, 58 insertions, 0 deletions

diff --git a/tests/auto/qcompleter/tst_qcompleter.cpp b/tests/auto/qcompleter/tst_qcompleter.cpp
index 67b9b67f37..656995a4c5 100644
--- a/tests/auto/qcompleter/tst_qcompleter.cpp
+++ b/tests/auto/qcompleter/tst_qcompleter.cpp
@@ -141,6 +141,7 @@ private slots:
     void task178797_activatedOnReturn();
     void task189564_omitNonSelectableItems();
     void task246056_setCompletionPrefix();
+    void task250064_lostFocus();
 
 private:
     void filter();
@@ -1126,5 +1127,62 @@ void tst_QCompleter::task246056_setCompletionPrefix()
     QTest::keyPress(comboBox->completer()->popup(), Qt::Key_Enter); // don't crash!
 }
 
+class task250064_TextEdit : public QTextEdit
+{
+public:
+    QCompleter *completer;
+
+    task250064_TextEdit()
+    {
+        completer = new QCompleter;
+        completer->setWidget(this);
+    }
+
+    void keyPressEvent (QKeyEvent *e)
+    {
+        completer->popup();
+        QTextEdit::keyPressEvent(e);
+    }
+};
+
+class task250064_Widget : public QWidget
+{
+    Q_OBJECT
+public:
+    task250064_TextEdit *textEdit;
+
+    task250064_Widget(task250064_TextEdit *textEdit)
+        : textEdit(textEdit)
+    {
+        QTabWidget *tabWidget = new QTabWidget;
+        tabWidget->setFocusPolicy(Qt::ClickFocus);
+        tabWidget->addTab(textEdit, "untitled");
+
+        QVBoxLayout *layout = new QVBoxLayout(this);
+        layout->addWidget(tabWidget);
+
+        textEdit->setPlainText("bla bla bla");
+        textEdit->setFocus();
+    }
+
+    void setCompletionModel()
+    {
+        textEdit->completer->setModel(0);
+    }
+};
+
+void tst_QCompleter::task250064_lostFocus()
+{
+    task250064_TextEdit *textEdit = new task250064_TextEdit;
+    task250064_Widget *widget = new task250064_Widget(textEdit);
+    widget->show();
+    QTest::qWait(100);
+    QTest::keyPress(textEdit, 'a');
+    Qt::FocusPolicy origPolicy = textEdit->focusPolicy();
+    QVERIFY(origPolicy != Qt::NoFocus);
+    widget->setCompletionModel();
+    QCOMPARE(textEdit->focusPolicy(), origPolicy);
+}
+
 QTEST_MAIN(tst_QCompleter)
 #include "tst_qcompleter.moc"